First Win XP UI Based Launcher on Play Store.
Launcher XP is a Android launcher that allows you to customize the appearance and functionality of your device's home screen.

Future:

Windows XP UI
Wireless Manager for Quick Turn on/off Wi-Fi, Bluetooth.
Quick Write note
Quick add contact
Fast & Clean Interface
Custom wallpaper can be set
Start button like XP

Important:
No widget support

Launcher XP is a very lightweight launcher that lets you keep all your apps organized in an elegant and smooth way, while offering many other features as well. By default, the main screen of your desktop will show your most-used apps: WhatsApp, Facebook, Settings, Camera, Google Chrome, etc.

Launcher is the name given to the part of the Android user interface that lets users customize the home screen (e.g. the phone's desktop), launch mobile apps, make phone calls, and perform other tasks on Android devices (devices that use the Android mobile operating system).